I have had my boy Henry for about 3.5 years now, and I have had him on Benefull Healthy Weight the whole time. Its cheap stuff I know but it works good for my dogs. I got Henry and he weighed 68lbs the first time I took him to the Vet to make sure his shot were up to date. Every time I have taken him back for Check-ups and the Good ol Basset Hound Ear Infections he has been between 68-71lbs, probably based on whether or not he has pooped before I take him in.
Now as far as I am told, Henry is a Pure Basset, and AKC says 55-65lbs for him, so he pretty close. Since I never have had a problem I keep him on what he is use to.